former president clinton teams up with mr. obama at a fundraiser tonight in california. two days later, clinton campaigns for the president in another battleground, nevada. >> mitt is up to the task. he's prepared. >> romney's wife ann goes in front of cameras wednesday morning when she's a special co-host on abc's "good morning, america." but the highlight of the week is this week's vice presidential debate. both are preparing for their own showdown which takes place thursday in danville, kentucky. >> i'm looking forward to it, i really am. the thing about congressman ryan is he's been straightfwoorward to now about all the significant changes he wants to make. we have a fundamentally different view on a whole range of issues. >> i'm studying, i'm reading joe biden's speeches, watching joe biden tape and just studying on all the various issues. >> and thanks to romney's strong performance at last week's debate, there is even more on the line at the vp showdown. fred? >> thanks so much, paul. big week ahead. the much anticipated vice presidential debate between joe biden